cornwall



(N0 Mode 1.)

J. B. CORNWALL. SPLIT PULLEY.

No. 449,608. Patented Mar. 31, 1891.

UNITED STATES ATENT FFICE.

JOHN B. COItN\VALL, OF MOLINE, ILLINOIS, ASSIGNOR TO THE BARNARD & LEAS MANUFACTURING COMPANY, OF SAME PLACE.

I SPLIT PU LLEY.

SPECIFICATION forming part of Letters Patent No. 449,608, dated March 31, 1891.,

Application filed m 14. 1890.

To all whom it may concern:

Be it known that 1, JOHN B. CORNWALL, of Moline, in the county of Rock Island and State of Illinois, have invented certain new and useful Improvements in Split Pulleys; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form part of this specification, in which Figure 1 is a side View of my improved pulley applied to a shaft. Fig. 2 is a central transverse section thereof. Fig. 3 is a meeting-face view of one of the halves.

The presentinvention is an'improveinent in split pulleys, and its object is to simplify the construction thereof, to improve the construction and attachmentof the grip or clamping blocks to the sections, and to make a solid or nearly solid spokeless pulley; and to these ends the invention consists in the novel construction and combination of parts hereinafter described and claimed.

Referring to the drawings by letter, A B designate the opposite similar halves of the pulley, which are constructed alike and preferably made of wood, each semicircular in face view and solid, excepting that at center or axial line of the halves they have recesses 0, through which the shaft S passes.

D D designate transverse sockets or channels formed in the recesses C on lines radiating from the axis of the wheel, and in these channels are secured clamping-blocks D D, preferably made of wood and set edgewise in the channels, so that the grain thereof is radial to the shaft. Four of these blocks are shown, two in each half A B.

The halves A B are united by bolts F F, which pass through corresponding openings (1, Z) in the halves and at right angles to the line of parting of the pulley, the heads of the bolts being sunk within the periphery of the pulley and their threaded ends and nuts thereon being within the periphery of the pulley, as indicated, and contained in enlargements of the openings at b. If desired, the halves might be divided into two parts each, as on lines a; as, Fig. 1, the outer part A B thus indicated being fastened to the body of Serial No. 358,597. (No model.)

necessary to remove it in securing the pulley on a shaft.

\Vhon formed with removable pieces A B, the pulley would be in four parts. The half containing the headed ends of the bolts might be built up solidly over the bolts, leaving but one removable piece A B on the opposite half, this being a three-piece pulley.

It will be observed that the blocks D D set radially to the shaft, and when bolts F are tighten ed clamp the shaft firmly and securely and the strain from the blocks when four are used is diagonal to the binding strain on the bolts uniting the halves.

The ends of blocks D D can be trimmed to enable the pulley to be fitted on different diameters of shafts, or the blocks can be changed for others of different width or thickness to fit the same on different shafts. This construction gives a solid pulley, can be made of wood, and of very small size, fromtwo inches up to several feet in diameter, and the smallest or largest be adjustable to different shafts. It has no arms or spokes, and preferably the blocks D are built up with the halves. Four blocks are sufficient for small pulleys, though a greater number might be employed for larger pulleys; but they should stand radial to the shaft and not contact each other.

Having described my invention, what I claim as new, and desire to secure by Letters Patent thereon, is-

1. In a split pulley, the combination of the opposite solid or spokelesshalves having central recesses on their meeting edges forming an opening for the passage of the shaft, and radiating transverse channels or sockets communicating with the recesses, and clampingblocks fixed in said sockets and projecting into the recesses, with the bolts and nuts for securing the halves together and upon the shaft, substantially as and for the purpose.

described.

2. In a split pulley, the combination of the half A, having a recess 0 on its meeting edge,

sockets D, communicating with said recess,-

and wooden clamping-blocks .1), fixed in said sockets and projecting into said recess with the half 15,1mving a removable portion 1% and recess 0, sockets D and blocks D, sin1ilar and opposite to those of half A, and the uniting bolts and nuts, substantially as speeified.

In testimonyilmt I claim the foregoing as my own I zll'lix my signature in presence oftwo witnesses.

JOHN B. CORNXVALL.

\Vitnesses:

W. R. MOORE, CARL GUSTUS. 

